In a saucepan, bring the cream and corn syrup to a simmer. Remove from the heat and stir in chocolate chips and vanilla. Let stand for 3-4 minutes. Whisk mixture until smooth. Cover and chill 90 minutes or until it reaches spreading consistency ( stirring every so often). remove from fridge and beat until fluffy ( frosts two 8 or 9 inch cakes). Enjoy licking the spoon!